refactor project (1/?)

LibCmo/CK2/CKGlobals.cpp

@@ -0,0 +1,51 @@
+#include "VTUtils.hpp"
+#if defined(LIBCMO_OS_WIN32)
+#define ZLIB_WINAPI
+#endif
+#include <zconf.h>
+
+#include "CKGlobals.hpp"
+#include <zlib.h>
+
+namespace LibCmo::CK2 {
+	void* CKPackData(const void* Data, CKINT size, CKINT& NewSize, CKINT compressionlevel) {
+		uLong boundary = compressBound(static_cast<uLong>(size));
+		char* DestBuffer = new char[boundary];
+
+		uLongf _destLen = static_cast<uLongf>(boundary);
+		if (compress2(
+			reinterpret_cast<Bytef*>(DestBuffer), &_destLen,
+			reinterpret_cast<const Bytef*>(Data), static_cast<uLong>(size),
+			static_cast<int>(compressionlevel)) != Z_OK) {
+			NewSize = 0;
+			delete[] DestBuffer;
+			return nullptr;
+		}
+
+		NewSize = static_cast<CKINT>(_destLen);
+		return DestBuffer;
+	}
+
+	void* CKUnPackData(CKINT DestSize, const void* SrcBuffer, CKINT SrcSize) {
+		char* DestBuffer = new char[DestSize];
+
+		uLongf cache = DestSize;
+		if (uncompress(
+			reinterpret_cast<Bytef*>(DestBuffer), &cache,
+			reinterpret_cast<const Bytef*>(SrcBuffer), SrcSize) != Z_OK) {
+			delete[] DestBuffer;
+			return nullptr;
+		}
+
+		return DestBuffer;
+	}
+
+	CKDWORD CKComputeDataCRC(const void* data, size_t size, CKDWORD PreviousCRC) {
+		return static_cast<CKDWORD>(adler32(
+			static_cast<uLong>(PreviousCRC),
+			reinterpret_cast<const Bytef*>(data),
+			static_cast<uInt>(size)
+			));
+	}
+
+}